Method for monitoring a reaction and to reaction system for implementing same

A method for monitoring a reaction and a reaction system are provided. The reaction system includes at least one vessel for the reaction medium, which is in fluid communication with an injection tube; at least one vessel for a carrier fluid that is immiscible with the reaction medium, which is in fluid communication with a reaction tube; the injection tube being mounted so as to lead into the reaction tube such that individual drops of the reaction medium can be injected into the reaction tube and into the immiscible carrier fluid, so as to form a train of reaction chambers; at least one detector for monitoring a reaction; a means for classifying the reaction chambers; and at least one means for recirculating reaction chambers in front of at least one detector for monitoring a reaction.